GB2033603B - Protective viewing devices - Google Patents

Protective viewing devices

Info

Publication number
GB2033603B
GB2033603B GB7842757A GB7842757A GB2033603B GB 2033603 B GB2033603 B GB 2033603B GB 7842757 A GB7842757 A GB 7842757A GB 7842757 A GB7842757 A GB 7842757A GB 2033603 B GB2033603 B GB 2033603B
Authority
GB
United Kingdom
Prior art keywords
viewing devices
protective viewing
protective
devices
viewing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7842757A
Other versions
GB2033603A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Applied Photophysics Ltd
Original Assignee
Applied Photophysics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Applied Photophysics Ltd filed Critical Applied Photophysics Ltd
Priority to GB7842757A priority Critical patent/GB2033603B/en
Priority to DE19792943733 priority patent/DE2943733A1/en
Publication of GB2033603A publication Critical patent/GB2033603A/en
Application granted granted Critical
Publication of GB2033603B publication Critical patent/GB2033603B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/281—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for attenuating light intensity, e.g. comprising rotatable polarising elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
    • A61F9/06—Masks, shields or hoods for welders
    • A61F9/065—Masks, shields or hoods for welders use of particular optical filters
    • A61F9/067—Masks, shields or hoods for welders use of particular optical filters with variable transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Polarising Elements (AREA)
GB7842757A 1978-11-01 1978-11-01 Protective viewing devices Expired GB2033603B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7842757A GB2033603B (en) 1978-11-01 1978-11-01 Protective viewing devices
DE19792943733 DE2943733A1 (en) 1978-11-01 1979-10-30 PROTECTIVE DEVICE FOR OBSERVATION DEVICES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7842757A GB2033603B (en) 1978-11-01 1978-11-01 Protective viewing devices

Publications (2)

Publication Number Publication Date
GB2033603A GB2033603A (en) 1980-05-21
GB2033603B true GB2033603B (en) 1982-10-13

Family

ID=10500727

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7842757A Expired GB2033603B (en) 1978-11-01 1978-11-01 Protective viewing devices

Country Status (2)

Country Link
DE (1) DE2943733A1 (en)
GB (1) GB2033603B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146135B (en) * 1983-08-04 1986-07-09 Photophysics Research Limited Improvements in or relating to light transmitting filters
GB8333903D0 (en) * 1983-12-19 2000-11-22 Marconi Co Ltd Optical protection
GB8907768D0 (en) * 1989-04-06 1989-05-17 Marconi Gec Ltd Optical limiter device

Also Published As

Publication number Publication date
DE2943733A1 (en) 1980-06-19
GB2033603A (en) 1980-05-21

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee